$ git clone -n https://src.fedoraproject.org/rpms/python-boto3.git /var/lib/mock/f40-build-1975948-25235/root/chroot_tmpdir/scmroot/python-boto3
Cloning into '/var/lib/mock/f40-build-1975948-25235/root/chroot_tmpdir/scmroot/python-boto3'...
$ git fetch origin 0eb99677eb6a7fd8f617b3791772f73c37f5b226:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-boto3
 * [new ref]         0eb99677eb6a7fd8f617b3791772f73c37f5b226 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0eb9967 1.34.157