$ git clone -n https://github.com/xcp-ng-rpms/nbd /var/lib/mock/v8.3-u-pcoval1-11134-29550/root/chroot_tmpdir/scmroot/nbd
Cloning into '/var/lib/mock/v8.3-u-pcoval1-11134-29550/root/chroot_tmpdir/scmroot/nbd'...
$ git fetch origin 1e0d7fd025a707a216dbdd551408f7c10a3cf0a2:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/nbd
 * [new ref]         1e0d7fd025a707a216dbdd551408f7c10a3cf0a2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1e0d7fd bump release for test build