$ git clone -n https://src.fedoraproject.org/rpms/rust-async-compression.git /var/lib/mock/f40-build-2688571-68099/root/chroot_tmpdir/scmroot/rust-async-compression
Cloning into '/var/lib/mock/f40-build-2688571-68099/root/chroot_tmpdir/scmroot/rust-async-compression'...
$ git fetch origin 2f87325c234fd1d336a11452e5a28e8668b49320:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-async-compression
 * [new ref]         2f87325c234fd1d336a11452e5a28e8668b49320 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2f87325 Update to version 0.4.7; Fixes RHBZ#2272477