$ git clone -n https://src.fedoraproject.org/rpms/obs-studio.git /var/lib/mock/f40-build-2716748-72677/root/chroot_tmpdir/scmroot/obs-studio
Cloning into '/var/lib/mock/f40-build-2716748-72677/root/chroot_tmpdir/scmroot/obs-studio'...
$ git fetch origin a9ff648a9196440df3af40c5bc9299c1622cde00:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/obs-studio
 * [new ref]         a9ff648a9196440df3af40c5bc9299c1622cde00 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a9ff648 Update to 30.1.1