$ git clone -n https://src.fedoraproject.org/rpms/rust-rustc-demangle.git /var/lib/mock/f40-build-2643188-66480/root/chroot_tmpdir/scmroot/rust-rustc-demangle
Cloning into '/var/lib/mock/f40-build-2643188-66480/root/chroot_tmpdir/scmroot/rust-rustc-demangle'...
$ git fetch origin 3ee46b3f84d44ea8f048734dca4f361d6d297938:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rustc-demangle
 * [new ref]         3ee46b3f84d44ea8f048734dca4f361d6d297938 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3ee46b3 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild