$ git clone -n https://src.fedoraproject.org/rpms/mediawriter.git /var/lib/mock/f43-build-59065286-6570778/root/chroot_tmpdir/scmroot/mediawriter
Cloning into '/var/lib/mock/f43-build-59065286-6570778/root/chroot_tmpdir/scmroot/mediawriter'...
$ git fetch origin a0912dc64819360f6764da366bc05cd153837dac:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mediawriter
 * [new ref]         a0912dc64819360f6764da366bc05cd153837dac -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a0912dc Update to 5.2.5 upstream release