$ git clone -n https://src.fedoraproject.org/rpms/vdr-osd2web.git /var/lib/mock/f39-build-1501991-34883/root/chroot_tmpdir/scmroot/vdr-osd2web
Cloning into '/var/lib/mock/f39-build-1501991-34883/root/chroot_tmpdir/scmroot/vdr-osd2web'...
$ git fetch origin c9cfb38ae0cb744bef07d53c2f89bddc5bcb9a3d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vdr-osd2web
 * [new ref]         c9cfb38ae0cb744bef07d53c2f89bddc5bcb9a3d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c9cfb38 Update to 0.3.2