$ git clone -n https://src.fedoraproject.org/rpms/mingw-mediawriter.git /var/lib/mock/f39-build-1833206-41891/root/chroot_tmpdir/scmroot/mingw-mediawriter
Cloning into '/var/lib/mock/f39-build-1833206-41891/root/chroot_tmpdir/scmroot/mingw-mediawriter'...
$ git fetch origin afb710776bfa112c24e35fad4c6a0d5d54cb537a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mingw-mediawriter
 * [new ref]         afb710776bfa112c24e35fad4c6a0d5d54cb537a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at afb7107 5.0.8