$ git clone -n https://src.fedoraproject.org/rpms/past-time.git /var/lib/mock/f39-build-1532468-36224/root/chroot_tmpdir/scmroot/past-time
Cloning into '/var/lib/mock/f39-build-1532468-36224/root/chroot_tmpdir/scmroot/past-time'...
$ git fetch origin bac2015d30ef7e45175d9ef8d042a75932e8093c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/past-time
 * [new ref]         bac2015d30ef7e45175d9ef8d042a75932e8093c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bac2015 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild