$ git clone -n https://src.fedoraproject.org/rpms/rust-utf8parse.git /var/lib/mock/f38-build-side-43-rust-devel-1411771-31436/root/chroot_tmpdir/scmroot/rust-utf8parse
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1411771-31436/root/chroot_tmpdir/scmroot/rust-utf8parse'...
$ git fetch origin 2248c338e32fafc18da8cb3cc8e5e95c69af3161:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-utf8parse
 * [new ref]         2248c338e32fafc18da8cb3cc8e5e95c69af3161 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2248c33 Update to version 0.2.1; Fixes RHBZ#2176928