$ git clone -n https://src.fedoraproject.org/rpms/rust-tempfile.git /var/lib/mock/f40-build-1905954-25074/root/chroot_tmpdir/scmroot/rust-tempfile
Cloning into '/var/lib/mock/f40-build-1905954-25074/root/chroot_tmpdir/scmroot/rust-tempfile'...
$ git fetch origin 9adbee6a8031177b0628f5055b48d8968fdd2abd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-tempfile
 * [new ref]         9adbee6a8031177b0628f5055b48d8968fdd2abd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9adbee6 Update to version 3.11.0; Fixes RHBZ#2302570