$ git clone -n https://src.fedoraproject.org/rpms/erlang-p1_acme.git /var/lib/mock/f45-build-8390-388/root/chroot_tmpdir/scmroot/erlang-p1_acme
Cloning into '/var/lib/mock/f45-build-8390-388/root/chroot_tmpdir/scmroot/erlang-p1_acme'...
$ git fetch origin 7fa6fca5c425a6cc11e60df1398cd280bb1721cd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/erlang-p1_acme
 * [new ref]         7fa6fca5c425a6cc11e60df1398cd280bb1721cd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7fa6fca Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild