$ git clone -n https://src.fedoraproject.org/rpms/python-colcon-core.git /var/lib/mock/f45-build-29985-642/root/chroot_tmpdir/scmroot/python-colcon-core
Cloning into '/var/lib/mock/f45-build-29985-642/root/chroot_tmpdir/scmroot/python-colcon-core'...
$ git fetch origin f323cb47903fd8988ab8f4856ef41f5210d32c86:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-colcon-core
 * [new ref]         f323cb47903fd8988ab8f4856ef41f5210d32c86 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f323cb4 Update to 0.21.3