$ git clone -n https://src.fedoraproject.org/rpms/media-downloader.git /var/lib/mock/f40-build-2610568-63883/root/chroot_tmpdir/scmroot/media-downloader
Cloning into '/var/lib/mock/f40-build-2610568-63883/root/chroot_tmpdir/scmroot/media-downloader'...
$ git fetch origin 0fd7fc02200bd2741fbb94580c9ffb294614b6f8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/media-downloader
 * [new ref]         0fd7fc02200bd2741fbb94580c9ffb294614b6f8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0fd7fc0 Update to 4.4.0