$ git clone -n https://src.fedoraproject.org/rpms/python-boto3.git /var/lib/mock/f39-build-1554202-37039/root/chroot_tmpdir/scmroot/python-boto3
Cloning into '/var/lib/mock/f39-build-1554202-37039/root/chroot_tmpdir/scmroot/python-boto3'...
$ git fetch origin b32135c877936d413871919ed3e62f473e89bea2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-boto3
 * [new ref]         b32135c877936d413871919ed3e62f473e89bea2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b32135c 1.28.21