$ git clone -n https://src.fedoraproject.org/rpms/vdr-skinenigmang.git /var/lib/mock/f40-build-1922761-25101/root/chroot_tmpdir/scmroot/vdr-skinenigmang
Cloning into '/var/lib/mock/f40-build-1922761-25101/root/chroot_tmpdir/scmroot/vdr-skinenigmang'...
$ git fetch origin 7d88a75d6a50e5c72f3f952e81172b15a2d519bf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vdr-skinenigmang
 * [new ref]         7d88a75d6a50e5c72f3f952e81172b15a2d519bf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7d88a75 Merge branch 'rawhide' into f40