$ git clone -n https://src.fedoraproject.org/rpms/rust-sha1.git /var/lib/mock/f40-build-2643435-66488/root/chroot_tmpdir/scmroot/rust-sha1
Cloning into '/var/lib/mock/f40-build-2643435-66488/root/chroot_tmpdir/scmroot/rust-sha1'...
$ git fetch origin e313e4b0c3ec864d0eed7ec034fa3034056b2a1c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-sha1
 * [new ref]         e313e4b0c3ec864d0eed7ec034fa3034056b2a1c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e313e4b Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild