$ git clone -n https://src.fedoraproject.org/rpms/rust-async-trait.git /var/lib/mock/f40-build-2643038-66480/root/chroot_tmpdir/scmroot/rust-async-trait
Cloning into '/var/lib/mock/f40-build-2643038-66480/root/chroot_tmpdir/scmroot/rust-async-trait'...
$ git fetch origin 48ae81f5667190b4d6b69f30099bcbb9ed8b2a11:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-async-trait
 * [new ref]         48ae81f5667190b4d6b69f30099bcbb9ed8b2a11 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 48ae81f Update to version 0.1.78; Fixes RHBZ#2269898