$ git clone -n https://src.fedoraproject.org/rpms/girara.git /var/lib/mock/f42-build-864523-172396/root/chroot_tmpdir/scmroot/girara
Cloning into '/var/lib/mock/f42-build-864523-172396/root/chroot_tmpdir/scmroot/girara'...
$ git fetch origin e2064c14a64c8364066c57f32273f5991eff53f9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/girara
 * [new ref]         e2064c14a64c8364066c57f32273f5991eff53f9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e2064c1 feat: update to 0.4.5 (fixes rh#2331281)