$ git clone -n https://src.fedoraproject.org/rpms/erlang-snappy.git /var/lib/mock/f45-build-8474-389/root/chroot_tmpdir/scmroot/erlang-snappy
Cloning into '/var/lib/mock/f45-build-8474-389/root/chroot_tmpdir/scmroot/erlang-snappy'...
$ git fetch origin a1feb6e75ef8b3518d33c3dda5a27f130ccd97e6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/erlang-snappy
 * [new ref]         a1feb6e75ef8b3518d33c3dda5a27f130ccd97e6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a1feb6e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild