$ git clone -n https://src.fedoraproject.org/rpms/rust-fd-lock.git /var/lib/mock/f38-build-side-43-rust-devel-1410253-31414/root/chroot_tmpdir/scmroot/rust-fd-lock
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1410253-31414/root/chroot_tmpdir/scmroot/rust-fd-lock'...
$ git fetch origin 7704bd064ab1b76d037e302769d270bd77b2947f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-fd-lock
 * [new ref]         7704bd064ab1b76d037e302769d270bd77b2947f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7704bd0 Update to version 3.0.12; Fixes RHBZ#2182621