$ git clone -n https://src.fedoraproject.org/rpms/rust-zerovec.git /var/lib/mock/f42-build-3252959-41225/root/chroot_tmpdir/scmroot/rust-zerovec
Cloning into '/var/lib/mock/f42-build-3252959-41225/root/chroot_tmpdir/scmroot/rust-zerovec'...
$ git fetch origin 1bf2819becd96ea984e8b8d62bfb2e76d2bb8fe4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-zerovec
 * [new ref]         1bf2819becd96ea984e8b8d62bfb2e76d2bb8fe4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1bf2819 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild