$ git clone -n https://pagure.io/fedora-kiwi-descriptions.git /var/lib/mock/f42-kiwi-build-60928546-6586011/root/chroot_tmpdir/fedora-kiwi-descriptions
Cloning into '/var/lib/mock/f42-kiwi-build-60928546-6586011/root/chroot_tmpdir/fedora-kiwi-descriptions'...
$ git fetch origin 8a5aec18d6ca2ca23a5ccfbfd588dbd9a539b792:KOJI_FETCH_HEAD
From https://pagure.io/fedora-kiwi-descriptions
 * [new ref]         8a5aec18d6ca2ca23a5ccfbfd588dbd9a539b792 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8a5aec1 Add gawk to the containers base