$ git clone -n https://github.com/xcp-ng-rpms/krb5.git /var/lib/mock/v8.3-u-pcoval1-11073-29510/root/chroot_tmpdir/scmroot/krb5
Cloning into '/var/lib/mock/v8.3-u-pcoval1-11073-29510/root/chroot_tmpdir/scmroot/krb5'...
$ git fetch origin c3c22140a5f0560d51327d1ac24630f4cdb2f89c:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/krb5
 * [new ref]         c3c22140a5f0560d51327d1ac24630f4cdb2f89c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c3c2214 bump release for test build