$ git clone -n https://src.fedoraproject.org/rpms/rust-async-trait.git /var/lib/mock/f40-build-2169389-50976/root/chroot_tmpdir/scmroot/rust-async-trait
Cloning into '/var/lib/mock/f40-build-2169389-50976/root/chroot_tmpdir/scmroot/rust-async-trait'...
$ git fetch origin 6fbbcd29a88573e15133bdc9b11680fac9669404:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-async-trait
 * [new ref]         6fbbcd29a88573e15133bdc9b11680fac9669404 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6fbbcd2 Update to version 0.1.75; Fixes RHBZ#2255471