$ git clone -n https://src.fedoraproject.org/rpms/rust-ouroboros_macro.git /var/lib/mock/f40-build-2653146-66899/root/chroot_tmpdir/scmroot/rust-ouroboros_macro
Cloning into '/var/lib/mock/f40-build-2653146-66899/root/chroot_tmpdir/scmroot/rust-ouroboros_macro'...
$ git fetch origin cba34c9dace403e46ffa95c6baad2d4b0f33d1df:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-ouroboros_macro
 * [new ref]         cba34c9dace403e46ffa95c6baad2d4b0f33d1df -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cba34c9 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild