$ git clone -n https://src.fedoraproject.org/rpms/vdr-skinenigmang.git /var/lib/mock/f40-build-1557359-23977/root/chroot_tmpdir/scmroot/vdr-skinenigmang
Cloning into '/var/lib/mock/f40-build-1557359-23977/root/chroot_tmpdir/scmroot/vdr-skinenigmang'...
$ git fetch origin 1e26c9109468a8c42079cdc04d796a0cd5662400:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vdr-skinenigmang
 * [new ref]         1e26c9109468a8c42079cdc04d796a0cd5662400 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1e26c91 Rebuilt for new VDR API version 2.6.8