$ git clone -n https://src.fedoraproject.org/rpms/syslog-ng.git /var/lib/mock/f39-build-1700785-41200/root/chroot_tmpdir/scmroot/syslog-ng
Cloning into '/var/lib/mock/f39-build-1700785-41200/root/chroot_tmpdir/scmroot/syslog-ng'...
$ git fetch origin e8b1976a8bb2bb45f501984081c538b21e65817f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/syslog-ng
 * [new ref]         e8b1976a8bb2bb45f501984081c538b21e65817f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e8b1976 fix excludes, making sure that the base package pulls