$ git clone -n https://src.fedoraproject.org/rpms/rust-rustc-hash.git /var/lib/mock/f38-build-side-43-rust-devel-1415919-31455/root/chroot_tmpdir/scmroot/rust-rustc-hash
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1415919-31455/root/chroot_tmpdir/scmroot/rust-rustc-hash'...
$ git fetch origin e63b2e501720bde99f6a17755ed54e445d72e0ae:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rustc-hash
 * [new ref]         e63b2e501720bde99f6a17755ed54e445d72e0ae -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e63b2e5 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild