$ git clone -n https://src.fedoraproject.org/rpms/m17n-lib.git /var/lib/mock/f45-build-17880-505/root/chroot_tmpdir/scmroot/m17n-lib
Cloning into '/var/lib/mock/f45-build-17880-505/root/chroot_tmpdir/scmroot/m17n-lib'...
$ git fetch origin 0d87c6704912780017ae42aa0e6228f123061f23:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/m17n-lib
 * [new ref]         0d87c6704912780017ae42aa0e6228f123061f23 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0d87c67 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild