$ git clone -n https://src.fedoraproject.org/rpms/m17n-db.git /var/lib/mock/f41-build-side-1-2658258-28541/root/chroot_tmpdir/scmroot/m17n-db
Cloning into '/var/lib/mock/f41-build-side-1-2658258-28541/root/chroot_tmpdir/scmroot/m17n-db'...
$ git fetch origin 50da41117c6b41f05f849b27e1704d73ea5ff774:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/m17n-db
 * [new ref]         50da41117c6b41f05f849b27e1704d73ea5ff774 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 50da411 Updated to 1.8.7