$ git clone -n https://src.fedoraproject.org/rpms/rust-async-fs.git /var/lib/mock/f40-build-2527461-61824/root/chroot_tmpdir/scmroot/rust-async-fs
Cloning into '/var/lib/mock/f40-build-2527461-61824/root/chroot_tmpdir/scmroot/rust-async-fs'...
$ git fetch origin 40bdf5ed03863bbd8a1269e89693a580f6d33fae:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-async-fs
 * [new ref]         40bdf5ed03863bbd8a1269e89693a580f6d33fae -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 40bdf5e Update to version 2.1.1; Fixes RHBZ#2262910