$ git clone -n https://src.fedoraproject.org/rpms/wingpanel.git /var/lib/mock/f42-build-3272985-41309/root/chroot_tmpdir/scmroot/wingpanel
Cloning into '/var/lib/mock/f42-build-3272985-41309/root/chroot_tmpdir/scmroot/wingpanel'...
$ git fetch origin 784f4fdb8a9070a8df67355c41f9ee4fdbf6a6f7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/wingpanel
 * [new ref]         784f4fdb8a9070a8df67355c41f9ee4fdbf6a6f7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 784f4fd Update to version 8.0.2; Fixes RHBZ#2344349