$ git clone -n https://src.fedoraproject.org/rpms/media-downloader.git /var/lib/mock/f45-build-18206-511/root/chroot_tmpdir/scmroot/media-downloader
Cloning into '/var/lib/mock/f45-build-18206-511/root/chroot_tmpdir/scmroot/media-downloader'...
$ git fetch origin 71cd9eca7a45f8376f75d5d492058d24b996fefa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/media-downloader
 * [new ref]         71cd9eca7a45f8376f75d5d492058d24b996fefa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 71cd9ec Update to 5.6.5