$ git clone -n https://src.fedoraproject.org/rpms/erlang-bear.git /var/lib/mock/f45-build-8287-383/root/chroot_tmpdir/scmroot/erlang-bear
Cloning into '/var/lib/mock/f45-build-8287-383/root/chroot_tmpdir/scmroot/erlang-bear'...
$ git fetch origin 4e50e12c70319089e1f53ac10b238ca9abf56eff:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/erlang-bear
 * [new ref]         4e50e12c70319089e1f53ac10b238ca9abf56eff -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4e50e12 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild