$ git clone -n https://src.fedoraproject.org/rpms/erlang-sidejob.git /var/lib/mock/f45-build-8466-389/root/chroot_tmpdir/scmroot/erlang-sidejob
Cloning into '/var/lib/mock/f45-build-8466-389/root/chroot_tmpdir/scmroot/erlang-sidejob'...
$ git fetch origin 31c10df4a0a2f9949fdebe4f5bb373b795ca7dfd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/erlang-sidejob
 * [new ref]         31c10df4a0a2f9949fdebe4f5bb373b795ca7dfd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 31c10df Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild