$ git clone -n https://github.com/xcp-ng-rpms/krb5.git /var/lib/mock/v8.3-u-pcoval1-11106-29531/root/chroot_tmpdir/scmroot/krb5
Cloning into '/var/lib/mock/v8.3-u-pcoval1-11106-29531/root/chroot_tmpdir/scmroot/krb5'...
$ git fetch origin d0c4f5985598164c28d57eaad77e56479aa2e8c0:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/krb5
 * [new ref]         d0c4f5985598164c28d57eaad77e56479aa2e8c0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d0c4f59 bump release for test build