$ git clone -n https://src.fedoraproject.org/rpms/slimdata.git /var/lib/mock/f39-build-1523527-36007/root/chroot_tmpdir/scmroot/slimdata
Cloning into '/var/lib/mock/f39-build-1523527-36007/root/chroot_tmpdir/scmroot/slimdata'...
$ git fetch origin 63d2ac756ac7e8b36eeee11a09030ccbb4dc2294:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/slimdata
 * [new ref]         63d2ac756ac7e8b36eeee11a09030ccbb4dc2294 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 63d2ac7 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild