$ git clone -n https://src.fedoraproject.org/rpms/rust-async-executor.git /var/lib/mock/f40-build-2683047-67967/root/chroot_tmpdir/scmroot/rust-async-executor
Cloning into '/var/lib/mock/f40-build-2683047-67967/root/chroot_tmpdir/scmroot/rust-async-executor'...
$ git fetch origin c8bac1aa1fc9342b0532efb7b24032c6dcb5a212:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-async-executor
 * [new ref]         c8bac1aa1fc9342b0532efb7b24032c6dcb5a212 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c8bac1a Update to version 1.9.1; Fixes RHBZ#2265460