$ git clone -n https://src.fedoraproject.org/rpms/rust-xdg.git /var/lib/mock/f39-build-1489335-34501/root/chroot_tmpdir/scmroot/rust-xdg
Cloning into '/var/lib/mock/f39-build-1489335-34501/root/chroot_tmpdir/scmroot/rust-xdg'...
$ git fetch origin c55bc4baffee7259fd7e4e98794c574c61e364ba:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-xdg
 * [new ref]         c55bc4baffee7259fd7e4e98794c574c61e364ba -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c55bc4b Update to version 2.5.2; Fixes RHBZ#2224803