$ git clone -n https://src.fedoraproject.org/rpms/bomber.git /var/lib/mock/f42-build-863913-172034/root/chroot_tmpdir/scmroot/bomber
Cloning into '/var/lib/mock/f42-build-863913-172034/root/chroot_tmpdir/scmroot/bomber'...
$ git fetch origin 42b9dede634091c04f9c1a1966681947e69af6f5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bomber
 * [new ref]         42b9dede634091c04f9c1a1966681947e69af6f5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 42b9ded 24.12.0