$ git clone -n https://src.fedoraproject.org/rpms/rust-hashbrown0.9.git /var/lib/mock/f40-build-2258613-54351/root/chroot_tmpdir/scmroot/rust-hashbrown0.9
Cloning into '/var/lib/mock/f40-build-2258613-54351/root/chroot_tmpdir/scmroot/rust-hashbrown0.9'...
$ git fetch origin f6f2447c7020702b5f6840961c9f9dfb4abf85a1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-hashbrown0.9
 * [new ref]         f6f2447c7020702b5f6840961c9f9dfb4abf85a1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f6f2447 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild