$ git clone -n https://src.fedoraproject.org/rpms/rust-no-panic.git /var/lib/mock/f40-build-2062912-49167/root/chroot_tmpdir/scmroot/rust-no-panic
Cloning into '/var/lib/mock/f40-build-2062912-49167/root/chroot_tmpdir/scmroot/rust-no-panic'...
$ git fetch origin dd23aa9577c3282fc63576788fc29b0ae1b79aed:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-no-panic
 * [new ref]         dd23aa9577c3282fc63576788fc29b0ae1b79aed -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dd23aa9 Update to version 0.1.27; Fixes RHBZ#2251091