$ git clone -n https://src.fedoraproject.org/rpms/rust-argh_derive.git /var/lib/mock/f39-build-1521523-35845/root/chroot_tmpdir/scmroot/rust-argh_derive
Cloning into '/var/lib/mock/f39-build-1521523-35845/root/chroot_tmpdir/scmroot/rust-argh_derive'...
$ git fetch origin 0ce2e81663e23610dbd85acf9a1490f3633f0fb3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-argh_derive
 * [new ref]         0ce2e81663e23610dbd85acf9a1490f3633f0fb3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0ce2e81 Update to version 0.1.12; Fixes RHBZ#2229849