$ git clone -n https://src.fedoraproject.org/rpms/rust-elf.git /var/lib/mock/f45-build-41412-782/root/chroot_tmpdir/scmroot/rust-elf
Cloning into '/var/lib/mock/f45-build-41412-782/root/chroot_tmpdir/scmroot/rust-elf'...
$ git fetch origin f6d9038e8f796519e805866fc3039e9372bf7b0e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-elf
 * [new ref]         f6d9038e8f796519e805866fc3039e9372bf7b0e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f6d9038 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild