$ git clone -n https://github.com/xcp-ng-rpms/gpumon.git /var/lib/mock/v8.3-incoming-11227-29598/root/chroot_tmpdir/scmroot/gpumon
Cloning into '/var/lib/mock/v8.3-incoming-11227-29598/root/chroot_tmpdir/scmroot/gpumon'...
$ git fetch origin b733e4dde719c49915e30473a954f68bf572f61b:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/gpumon
 * [new ref]         b733e4dde719c49915e30473a954f68bf572f61b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b733e4d Merge branch 'XS-8.3' into asv/xsrebase