$ git clone -n https://src.fedoraproject.org/rpms/rust-difftastic.git /var/lib/mock/f39-test-2568388-62222/root/chroot_tmpdir/scmroot/rust-difftastic
Cloning into '/var/lib/mock/f39-test-2568388-62222/root/chroot_tmpdir/scmroot/rust-difftastic'...
$ git fetch origin ca87274093ea40b17aef02811bd607919da25823:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-difftastic
 * [new ref]         ca87274093ea40b17aef02811bd607919da25823 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ca87274 Update to 0.56.1 (rhbz#2268044)