$ git clone -n https://src.fedoraproject.org/rpms/vlc.git /var/lib/mock/f40-build-774056-127571/root/chroot_tmpdir/scmroot/vlc
Cloning into '/var/lib/mock/f40-build-774056-127571/root/chroot_tmpdir/scmroot/vlc'...
$ git fetch origin c89dd01cd3a690b5a97de7aa7a109d36b5f064e1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vlc
 * [new ref]         c89dd01cd3a690b5a97de7aa7a109d36b5f064e1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c89dd01 Rebuild for dav1d 1.3.0