$ git clone -n https://src.fedoraproject.org/rpms/rust-fs_extra.git /var/lib/mock/f38-build-side-43-rust-devel-1415906-31455/root/chroot_tmpdir/scmroot/rust-fs_extra
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1415906-31455/root/chroot_tmpdir/scmroot/rust-fs_extra'...
$ git fetch origin 51bc8a13c3023792693460c220fe1f704fae03c7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-fs_extra
 * [new ref]         51bc8a13c3023792693460c220fe1f704fae03c7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 51bc8a1 Update to version 1.3.0; Fixes RHBZ#2166987