$ git clone -n https://src.fedoraproject.org/rpms/python-boto3.git /var/lib/mock/f40-build-1821456-24912/root/chroot_tmpdir/scmroot/python-boto3
Cloning into '/var/lib/mock/f40-build-1821456-24912/root/chroot_tmpdir/scmroot/python-boto3'...
$ git fetch origin 60006d8ce4b12e46311c88f7d412988f9f5fe7d8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-boto3
 * [new ref]         60006d8ce4b12e46311c88f7d412988f9f5fe7d8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 60006d8 1.34.151