$ git clone -n https://src.fedoraproject.org/rpms/rsyslog.git /var/lib/mock/f45-build-34699-690/root/chroot_tmpdir/scmroot/rsyslog
Cloning into '/var/lib/mock/f45-build-34699-690/root/chroot_tmpdir/scmroot/rsyslog'...
$ git fetch origin f81baa359b6932c7da97cd6b9d11296876169a8c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rsyslog
 * [new ref]         f81baa359b6932c7da97cd6b9d11296876169a8c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f81baa3 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild