$ git clone -n https://src.fedoraproject.org/rpms/rust-wezterm-dynamic-derive.git /var/lib/mock/f41-build-side-1-3099440-39334/root/chroot_tmpdir/scmroot/rust-wezterm-dynamic-derive
Cloning into '/var/lib/mock/f41-build-side-1-3099440-39334/root/chroot_tmpdir/scmroot/rust-wezterm-dynamic-derive'...
$ git fetch origin f8a55af4c860fa781ddef3b76f0fda864a684421:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-wezterm-dynamic-derive
 * [new ref]         f8a55af4c860fa781ddef3b76f0fda864a684421 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f8a55af no longer needed