$ git clone -n https://src.fedoraproject.org/rpms/proxygen.git /var/lib/mock/f40-build-799293-142260/root/chroot_tmpdir/scmroot/proxygen
Cloning into '/var/lib/mock/f40-build-799293-142260/root/chroot_tmpdir/scmroot/proxygen'...
$ git fetch origin 553bb33a6454836f70e59853df866a94b7938b66:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/proxygen
 * [new ref]         553bb33a6454836f70e59853df866a94b7938b66 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 553bb33 Update to 2024.01.22.00