$ git clone -n https://src.fedoraproject.org/rpms/rust-getrandom.git /var/lib/mock/f40-build-2641259-66427/root/chroot_tmpdir/scmroot/rust-getrandom
Cloning into '/var/lib/mock/f40-build-2641259-66427/root/chroot_tmpdir/scmroot/rust-getrandom'...
$ git fetch origin c4d6391ccc12732893a17a49675c4a0c2004a962:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-getrandom
 * [new ref]         c4d6391ccc12732893a17a49675c4a0c2004a962 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c4d6391 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild