$ git clone -n https://src.fedoraproject.org/rpms/rust-subprocess.git /var/lib/mock/f40-build-2717071-72727/root/chroot_tmpdir/scmroot/rust-subprocess
Cloning into '/var/lib/mock/f40-build-2717071-72727/root/chroot_tmpdir/scmroot/rust-subprocess'...
$ git fetch origin fb8c060776ed27bef18a71effcfb0a8e585672e2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-subprocess
 * [new ref]         fb8c060776ed27bef18a71effcfb0a8e585672e2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fb8c060 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild