$ git clone -n https://src.fedoraproject.org/rpms/prooftree.git /var/lib/mock/f40-build-2024098-46963/root/chroot_tmpdir/scmroot/prooftree
Cloning into '/var/lib/mock/f40-build-2024098-46963/root/chroot_tmpdir/scmroot/prooftree'...
$ git fetch origin 26ee6b33021c4ee17a8e5e0334900dfb18dfcf40:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/prooftree
 * [new ref]         26ee6b33021c4ee17a8e5e0334900dfb18dfcf40 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 26ee6b3 OCaml 5.1.1 rebuild for Fedora 40