$ git clone -n https://src.fedoraproject.org/rpms/vdr-osd2web.git /var/lib/mock/f40-build-1557361-23977/root/chroot_tmpdir/scmroot/vdr-osd2web
Cloning into '/var/lib/mock/f40-build-1557361-23977/root/chroot_tmpdir/scmroot/vdr-osd2web'...
$ git fetch origin b6105012e4ec6d252b1dbce2dea9f3402b8c9cc1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vdr-osd2web
 * [new ref]         b6105012e4ec6d252b1dbce2dea9f3402b8c9cc1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b610501 Rebuilt for new VDR API version 2.6.8