$ git clone -n https://src.fedoraproject.org/rpms/rsyslog.git /var/lib/mock/f41-build-835726-158627/root/chroot_tmpdir/scmroot/rsyslog
Cloning into '/var/lib/mock/f41-build-835726-158627/root/chroot_tmpdir/scmroot/rsyslog'...
$ git fetch origin 2189965d8382d804854e22e82d4cf05696e94c95:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rsyslog
 * [new ref]         2189965d8382d804854e22e82d4cf05696e94c95 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2189965 rebuild for hiredis soname bump