$ git clone -n https://src.fedoraproject.org/rpms/libchewing.git /var/lib/mock/f41-build-813755-148788/root/chroot_tmpdir/scmroot/libchewing
Cloning into '/var/lib/mock/f41-build-813755-148788/root/chroot_tmpdir/scmroot/libchewing'...
$ git fetch origin 99a285cb5f640dc0fd74f30af7e14b24be7fbd2b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libchewing
 * [new ref]         99a285cb5f640dc0fd74f30af7e14b24be7fbd2b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 99a285c Update to 0.8.5