$ git clone -n https://src.fedoraproject.org/rpms/fcitx.git /var/lib/mock/f45-build-8736-394/root/chroot_tmpdir/scmroot/fcitx
Cloning into '/var/lib/mock/f45-build-8736-394/root/chroot_tmpdir/scmroot/fcitx'...
$ git fetch origin 68f0ff3ceb54ca4631c3363d4bdfb555291ac6b4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fcitx
 * [new ref]         68f0ff3ceb54ca4631c3363d4bdfb555291ac6b4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 68f0ff3 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild