$ git clone -n https://src.fedoraproject.org/rpms/gvfs.git /var/lib/mock/f40-build-1239596-22917/root/chroot_tmpdir/scmroot/gvfs
Cloning into '/var/lib/mock/f40-build-1239596-22917/root/chroot_tmpdir/scmroot/gvfs'...
$ git fetch origin 46fef310400e033dcd7926e82f52a6d9c3e61dd7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gvfs
 * [new ref]         46fef310400e033dcd7926e82f52a6d9c3e61dd7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 46fef31 Update to 1.54.2