$ git clone -n https://src.fedoraproject.org/rpms/maven-archetype.git /var/lib/mock/f41-build-1042005-18995/root/chroot_tmpdir/scmroot/maven-archetype
Cloning into '/var/lib/mock/f41-build-1042005-18995/root/chroot_tmpdir/scmroot/maven-archetype'...
$ git fetch origin 6f5a2c3916c8fd8ee544ad871e4ad4112471efad:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/maven-archetype
 * [new ref]         6f5a2c3916c8fd8ee544ad871e4ad4112471efad -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6f5a2c3 Eliminate use of obsolete %patchN syntax (#2283636)