$ git clone -n https://src.fedoraproject.org/rpms/python-google-cloud-billing.git /var/lib/mock/f38-build-side-42-init-devel-839742-28409/root/chroot_tmpdir/scmroot/python-google-cloud-billing
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-839742-28409/root/chroot_tmpdir/scmroot/python-google-cloud-billing'...
$ git fetch origin 5725b24fcd7fca8cd18206cf6d4accfc9418907f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-google-cloud-billing
 * [new ref]         5725b24fcd7fca8cd18206cf6d4accfc9418907f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5725b24 Update to 1.10.1 rhbz#2182123