$ git clone -n https://src.fedoraproject.org/rpms/rust-ahash.git /var/lib/mock/f40-build-2034644-47904/root/chroot_tmpdir/scmroot/rust-ahash
Cloning into '/var/lib/mock/f40-build-2034644-47904/root/chroot_tmpdir/scmroot/rust-ahash'...
$ git fetch origin a4bc0669abe3ff78dd3f11dc3aca9a21767fcd7c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-ahash
 * [new ref]         a4bc0669abe3ff78dd3f11dc3aca9a21767fcd7c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a4bc066 Update to version 0.8.6; Fixes RHBZ#2245597