$ git clone -n https://src.fedoraproject.org/rpms/bacula-docs.git /var/lib/mock/f40-build-2488502-61651/root/chroot_tmpdir/scmroot/bacula-docs
Cloning into '/var/lib/mock/f40-build-2488502-61651/root/chroot_tmpdir/scmroot/bacula-docs'...
$ git fetch origin f1e71e07b24ba3f3e94b34bb35a038cb4b8c065e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bacula-docs
 * [new ref]         f1e71e07b24ba3f3e94b34bb35a038cb4b8c065e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f1e71e0 Almost impossible to build with Fedora's system packages