$ git clone -n https://src.fedoraproject.org/rpms/python-s3transfer.git /var/lib/mock/f45-build-32846-664/root/chroot_tmpdir/scmroot/python-s3transfer
Cloning into '/var/lib/mock/f45-build-32846-664/root/chroot_tmpdir/scmroot/python-s3transfer'...
$ git fetch origin da227b7fb348e8c02b054a887a2763b0b856bf9b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-s3transfer
 * [new ref]         da227b7fb348e8c02b054a887a2763b0b856bf9b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at da227b7 0.19.2