$ git clone -n https://src.fedoraproject.org/rpms/proxygen.git /var/lib/mock/f38-build-side-42-init-devel-1124146-30265/root/chroot_tmpdir/scmroot/proxygen
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1124146-30265/root/chroot_tmpdir/scmroot/proxygen'...
$ git fetch origin 63ed6ae18b0adec1a7e0df8c98bf7d429fafa116:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/proxygen
 * [new ref]         63ed6ae18b0adec1a7e0df8c98bf7d429fafa116 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 63ed6ae Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild