$ git clone -n https://src.fedoraproject.org/rpms/python-boto3.git /var/lib/mock/f41-build-926211-17111/root/chroot_tmpdir/scmroot/python-boto3
Cloning into '/var/lib/mock/f41-build-926211-17111/root/chroot_tmpdir/scmroot/python-boto3'...
$ git fetch origin 3788949109d407f89632dfb1848d4d64b5045126:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-boto3
 * [new ref]         3788949109d407f89632dfb1848d4d64b5045126 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3788949 1.34.124