$ git clone -n https://src.fedoraproject.org/rpms/folly.git /var/lib/mock/f41-build-846092-162961/root/chroot_tmpdir/scmroot/folly
Cloning into '/var/lib/mock/f41-build-846092-162961/root/chroot_tmpdir/scmroot/folly'...
$ git fetch origin dd943a8f75f5c6bd428660f0cb2a0945b358fd84:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/folly
 * [new ref]         dd943a8f75f5c6bd428660f0cb2a0945b358fd84 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dd943a8 Exclude another test that is flaky on x86_64