$ git clone -n https://src.fedoraproject.org/rpms/rust-xdg-home.git /var/lib/mock/f40-build-2644535-66507/root/chroot_tmpdir/scmroot/rust-xdg-home
Cloning into '/var/lib/mock/f40-build-2644535-66507/root/chroot_tmpdir/scmroot/rust-xdg-home'...
$ git fetch origin 6663a5b4d16eb467c671093eee95a4c90e14bacc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-xdg-home
 * [new ref]         6663a5b4d16eb467c671093eee95a4c90e14bacc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6663a5b Update to version 1.1.0; Fixes RHBZ#2262653