$ git clone -n https://src.fedoraproject.org/rpms/watchman.git /var/lib/mock/f38-build-side-42-init-devel-1283196-30672/root/chroot_tmpdir/scmroot/watchman
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1283196-30672/root/chroot_tmpdir/scmroot/watchman'...
$ git fetch origin 845644620e6c53f03fd22c3c1fc5b8aa6de58a81:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/watchman
 * [new ref]         845644620e6c53f03fd22c3c1fc5b8aa6de58a81 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8456446 Rebuild for folly 2023.07.03.00