$ git clone -n https://github.com/xcp-ng-rpms/krb5.git /var/lib/mock/v8.3-u-pcoval2-10362-28925/root/chroot_tmpdir/scmroot/krb5
Cloning into '/var/lib/mock/v8.3-u-pcoval2-10362-28925/root/chroot_tmpdir/scmroot/krb5'...
$ git fetch origin 0cdfafab5cf5c1935b884be78b6b60b8b0fa0ce0:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/krb5
 * [new ref]         0cdfafab5cf5c1935b884be78b6b60b8b0fa0ce0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0cdfafa bump release for test build