$ git clone -n https://src.fedoraproject.org/rpms/maven.git /var/lib/mock/f40-build-2243734-53698/root/chroot_tmpdir/scmroot/maven
Cloning into '/var/lib/mock/f40-build-2243734-53698/root/chroot_tmpdir/scmroot/maven'...
$ git fetch origin b6199561fa0339c5177f7e399d5cc9aa41d3a3de:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/maven
 * [new ref]         b6199561fa0339c5177f7e399d5cc9aa41d3a3de -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b619956 Make JDK bindings work with different Maven version suffixes