$ git clone -n https://src.fedoraproject.org/rpms/rust-cstr.git /var/lib/mock/f40-build-2656406-66915/root/chroot_tmpdir/scmroot/rust-cstr
Cloning into '/var/lib/mock/f40-build-2656406-66915/root/chroot_tmpdir/scmroot/rust-cstr'...
$ git fetch origin 963ea72c46337996fc90aaad235bdc31578b3e91:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-cstr
 * [new ref]         963ea72c46337996fc90aaad235bdc31578b3e91 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 963ea72 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild