So one has that "get" /ɡɛt/ and "got" /ɡɒt/ are a minimal pair, for it's only the vocalic phoneme which distinguishes them. However, the first sound is not pronounced/articulated in the same manner as the second. So how do we note these sounds in IPA, in order to show that there's a palatalization in the first sound which is absent in the second?
In English, a front(ish) vowel—so, /i:, ɪ, e/ɛ, æ/—will cause the place of articulation of a preceding velar plosive to be slightly advanced. If you try saying the words cot and cat, you will notice that, for the word cat, the tongue touches the roof of the mouth slightly more towards the front of the mouth when making the [k] sound than it does in the word cot. The way of showing this using conventional IPA notation is to put a small '+' sign underneath the consonant in question:
- get [g̟ɛt]
- cat [k̟æt]
Notice that in the transcriptions above, square brackets have been used, not slanty ones (i.e. , not //). This is because this kind of detailed information does not appear in broad, phonemic transcriptions.
It's also worth knowing that the 'advanced' diacritic, +, may appear above a consonant if the symbol has a tail, for example the curl at the bottom of < g >, or if the consonant already has another diacritic applied.