$ git clone -n https://src.fedoraproject.org/rpms/gnatcoll-db.git /var/lib/mock/f39-build-2403841-60557/root/chroot_tmpdir/scmroot/gnatcoll-db
Cloning into '/var/lib/mock/f39-build-2403841-60557/root/chroot_tmpdir/scmroot/gnatcoll-db'...
$ git fetch origin 2a627bf9fbe6190885eb78258a1b9e0a223e20d0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnatcoll-db
 * [new ref]         2a627bf9fbe6190885eb78258a1b9e0a223e20d0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2a627bf Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild