$ git clone -n https://src.fedoraproject.org/rpms/obs-studio.git /var/lib/mock/f38-build-side-42-init-devel-1323294-30692/root/chroot_tmpdir/scmroot/obs-studio
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1323294-30692/root/chroot_tmpdir/scmroot/obs-studio'...
$ git fetch origin 3230e3cb4c0d59ba906e562aaf53785b5a00b3e0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/obs-studio
 * [new ref]         3230e3cb4c0d59ba906e562aaf53785b5a00b3e0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3230e3c Add obs-plugins libexecdir to libs subpackage