$ git clone -n https://src.fedoraproject.org/rpms/python-aiohttp.git /var/lib/mock/f40-build-2058682-49149/root/chroot_tmpdir/scmroot/python-aiohttp
Cloning into '/var/lib/mock/f40-build-2058682-49149/root/chroot_tmpdir/scmroot/python-aiohttp'...
$ git fetch origin 4cf3da2c93e0a016c8cd2baeeb69258329474d00:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-aiohttp
 * [new ref]         4cf3da2c93e0a016c8cd2baeeb69258329474d00 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4cf3da2 Update to 3.9.1 (fix RHBZ#2252236, fix RHBZ#2252249)