$ git clone -n https://src.fedoraproject.org/rpms/fmt.git /var/lib/mock/f40-build-2262676-54516/root/chroot_tmpdir/scmroot/fmt
Cloning into '/var/lib/mock/f40-build-2262676-54516/root/chroot_tmpdir/scmroot/fmt'...
$ git fetch origin 12c70290707af03503b1acdb4dd20c4d9bd15164:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fmt
 * [new ref]         12c70290707af03503b1acdb4dd20c4d9bd15164 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 12c7029 Update to version 10.2.1