$ git clone -n https://src.fedoraproject.org/rpms/obs-studio-plugin-webkitgtk.git /var/lib/mock/f41-build-858899-168497/root/chroot_tmpdir/scmroot/obs-studio-plugin-webkitgtk
Cloning into '/var/lib/mock/f41-build-858899-168497/root/chroot_tmpdir/scmroot/obs-studio-plugin-webkitgtk'...
$ git fetch origin c4117e8f3389a42fe30af2777e799277459ebebe:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/obs-studio-plugin-webkitgtk
 * [new ref]         c4117e8f3389a42fe30af2777e799277459ebebe -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c4117e8 Rebuild for OBS Studio v31