$ git clone -n https://src.fedoraproject.org/rpms/sblg.git /var/lib/mock/f45-build-35570-696/root/chroot_tmpdir/scmroot/sblg
Cloning into '/var/lib/mock/f45-build-35570-696/root/chroot_tmpdir/scmroot/sblg'...
$ git fetch origin 5eff15ffdf2ba7eaba7fda0f4c5782acd104bd78:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sblg
 * [new ref]         5eff15ffdf2ba7eaba7fda0f4c5782acd104bd78 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5eff15f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild