$ git clone -n https://github.com/xcp-ng-rpms/krb5.git /var/lib/mock/v8.3-incoming-10005-28660/root/chroot_tmpdir/scmroot/krb5
Cloning into '/var/lib/mock/v8.3-incoming-10005-28660/root/chroot_tmpdir/scmroot/krb5'...
$ git fetch origin 02d03f9cb2680bf40908938aed76541ba26a03ad:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/krb5
 * [new ref]         02d03f9cb2680bf40908938aed76541ba26a03ad -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 02d03f9 Make build dependency to latex optionnal