$ git clone -n https://src.fedoraproject.org/rpms/elements-alexandria.git /var/lib/mock/f39-build-1648963-40452/root/chroot_tmpdir/scmroot/elements-alexandria
Cloning into '/var/lib/mock/f39-build-1648963-40452/root/chroot_tmpdir/scmroot/elements-alexandria'...
$ git fetch origin b6eafd7ded97cececebba4b838b686129684f09b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/elements-alexandria
 * [new ref]         b6eafd7ded97cececebba4b838b686129684f09b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b6eafd7 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild