$ git clone -n https://src.fedoraproject.org/rpms/gnatcoll-db.git /var/lib/mock/f42-build-3357736-45030/root/chroot_tmpdir/scmroot/gnatcoll-db
Cloning into '/var/lib/mock/f42-build-3357736-45030/root/chroot_tmpdir/scmroot/gnatcoll-db'...
$ git fetch origin c154d7d0936bece6968f55dc759f2dcf1f57fe8b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnatcoll-db
 * [new ref]         c154d7d0936bece6968f55dc759f2dcf1f57fe8b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c154d7d Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild