$ git clone -n https://src.fedoraproject.org/rpms/gstreamer1-plugins-base.git /var/lib/mock/f41-build-850542-165462/root/chroot_tmpdir/scmroot/gstreamer1-plugins-base
Cloning into '/var/lib/mock/f41-build-850542-165462/root/chroot_tmpdir/scmroot/gstreamer1-plugins-base'...
$ git fetch origin 43d8b2621ace081c62f830c2ea051023bb7c008a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gstreamer1-plugins-base
 * [new ref]         43d8b2621ace081c62f830c2ea051023bb7c008a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 43d8b26 1.24.8