$ git clone -n https://src.fedoraproject.org/rpms/python-yarl.git /var/lib/mock/f38-build-729909-101930/root/chroot_tmpdir/scmroot/python-yarl
Cloning into '/var/lib/mock/f38-build-729909-101930/root/chroot_tmpdir/scmroot/python-yarl'...
$ git fetch origin 22527b097d46de1029965342f2e273f304cd96a8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-yarl
 * [new ref]         22527b097d46de1029965342f2e273f304cd96a8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 22527b0 Update to latest upstream release 1.8.2 (closes rhbz#2150499)