$ git clone -n https://src.fedoraproject.org/rpms/fbthrift.git /var/lib/mock/f39-build-1931499-43112/root/chroot_tmpdir/scmroot/fbthrift
Cloning into '/var/lib/mock/f39-build-1931499-43112/root/chroot_tmpdir/scmroot/fbthrift'...
$ git fetch origin 91d06a12f4888ead491f5429c6e2cc9dfbb8ba89:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fbthrift
 * [new ref]         91d06a12f4888ead491f5429c6e2cc9dfbb8ba89 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 91d06a1 Update to 2023.10.16.00