$ git clone -n https://src.fedoraproject.org/rpms/rust-imagequant.git /var/lib/mock/f42-build-3231196-41191/root/chroot_tmpdir/scmroot/rust-imagequant
Cloning into '/var/lib/mock/f42-build-3231196-41191/root/chroot_tmpdir/scmroot/rust-imagequant'...
$ git fetch origin 14efb93af58925a5fd32afe6a34135611a10a41c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-imagequant
 * [new ref]         14efb93af58925a5fd32afe6a34135611a10a41c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 14efb93 Update to version 4.3.4 (rhbz#2341806)