$ git clone -n https://src.fedoraproject.org/rpms/bomber.git /var/lib/mock/f42-build-side-114543-60917438-6585763/root/chroot_tmpdir/scmroot/bomber
Cloning into '/var/lib/mock/f42-build-side-114543-60917438-6585763/root/chroot_tmpdir/scmroot/bomber'...
$ git fetch origin d1d4c00a6b0c6e56394927a69c58957c6cc08402:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bomber
 * [new ref]         d1d4c00a6b0c6e56394927a69c58957c6cc08402 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d1d4c00 25.04.3