$ git clone -n https://src.fedoraproject.org/rpms/rust-ahash.git /var/lib/mock/f40-build-1538239-23931/root/chroot_tmpdir/scmroot/rust-ahash
Cloning into '/var/lib/mock/f40-build-1538239-23931/root/chroot_tmpdir/scmroot/rust-ahash'...
$ git fetch origin 644b193acfbda1f5b74abbd7323591f12d83e0cf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-ahash
 * [new ref]         644b193acfbda1f5b74abbd7323591f12d83e0cf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 644b193 Update to version 0.8.11; Fixes RHBZ#2265030