$ git clone -n https://src.fedoraproject.org/rpms/mir.git /var/lib/mock/f41-build-854060-166804/root/chroot_tmpdir/scmroot/mir
Cloning into '/var/lib/mock/f41-build-854060-166804/root/chroot_tmpdir/scmroot/mir'...
$ git fetch origin 96978c6d43fce1b4d724a3ae5e9a10055fb26418:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mir
 * [new ref]         96978c6d43fce1b4d724a3ae5e9a10055fb26418 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 96978c6 Update to 2.18.2