$ git clone -n https://src.fedoraproject.org/rpms/mariadb10.11.git /var/lib/mock/f40-build-781262-131566/root/chroot_tmpdir/scmroot/mariadb10.11
Cloning into '/var/lib/mock/f40-build-781262-131566/root/chroot_tmpdir/scmroot/mariadb10.11'...
$ git fetch origin 19889e78e36da047ecf437f6f08b7412a6264c40:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mariadb10.11
 * [new ref]         19889e78e36da047ecf437f6f08b7412a6264c40 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 19889e7 Release bump