$ git clone -n https://src.fedoraproject.org/rpms/geary.git /var/lib/mock/f45-build-9724-408/root/chroot_tmpdir/scmroot/geary
Cloning into '/var/lib/mock/f45-build-9724-408/root/chroot_tmpdir/scmroot/geary'...
$ git fetch origin 94c676cb7b6958177a8c4314592627283d55ac4c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/geary
 * [new ref]         94c676cb7b6958177a8c4314592627283d55ac4c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 94c676c Rebuild for evolution-data-server soname bump