$ git clone -n https://github.com/xcp-ng-rpms/mdadm /var/lib/mock/v8.3-u-pcoval2-11485-29788/root/chroot_tmpdir/scmroot/mdadm
Cloning into '/var/lib/mock/v8.3-u-pcoval2-11485-29788/root/chroot_tmpdir/scmroot/mdadm'...
$ git fetch origin f6f411146974c957bc60d75917fbaa1cdb6eaeca:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/mdadm
 * [new ref]         f6f411146974c957bc60d75917fbaa1cdb6eaeca -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f6f4111 bump release for test build