$ git clone -n https://src.fedoraproject.org/rpms/kaffeine.git /var/lib/mock/f41-build-860493-168951/root/chroot_tmpdir/scmroot/kaffeine
Cloning into '/var/lib/mock/f41-build-860493-168951/root/chroot_tmpdir/scmroot/kaffeine'...
$ git fetch origin 4084600bf57991348e238190496f60dfa6ea0083:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kaffeine
 * [new ref]         4084600bf57991348e238190496f60dfa6ea0083 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4084600 Add vlc-plugins-extra dependency