$ git clone -n https://src.fedoraproject.org/rpms/python-boto3.git /var/lib/mock/f41-build-side-1-3080495-38952/root/chroot_tmpdir/scmroot/python-boto3
Cloning into '/var/lib/mock/f41-build-side-1-3080495-38952/root/chroot_tmpdir/scmroot/python-boto3'...
$ git fetch origin 9c360641fb9bf2748d15a322bd4905bd19661e65:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-boto3
 * [new ref]         9c360641fb9bf2748d15a322bd4905bd19661e65 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9c36064 1.35.57