$ git clone -n https://src.fedoraproject.org/rpms/rust-typed-arena.git /var/lib/mock/f39-build-1445518-32653/root/chroot_tmpdir/scmroot/rust-typed-arena
Cloning into '/var/lib/mock/f39-build-1445518-32653/root/chroot_tmpdir/scmroot/rust-typed-arena'...
$ git fetch origin 849acb1c1b41400cea36ddece9c5b0322744e1d3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-typed-arena
 * [new ref]         849acb1c1b41400cea36ddece9c5b0322744e1d3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 849acb1 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild