$ git clone -n https://github.com/xcp-ng-rpms/xcp-ng-deps.git /var/lib/mock/v8.3-u-pcoval2-10882-29381/root/chroot_tmpdir/scmroot/xcp-ng-deps
Cloning into '/var/lib/mock/v8.3-u-pcoval2-10882-29381/root/chroot_tmpdir/scmroot/xcp-ng-deps'...
$ git fetch origin 3489bbaebe00c63d432e09cb9216ca2f44e82a18:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xcp-ng-deps
 * [new ref]         3489bbaebe00c63d432e09cb9216ca2f44e82a18 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3489bba bump release for test build