$ git clone -n https://src.fedoraproject.org/rpms/rust-im-rc.git /var/lib/mock/f39-build-1521801-35859/root/chroot_tmpdir/scmroot/rust-im-rc
Cloning into '/var/lib/mock/f39-build-1521801-35859/root/chroot_tmpdir/scmroot/rust-im-rc'...
$ git fetch origin 2ae36496a9aab0493b48ca3616ee8ad109f149ca:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-im-rc
 * [new ref]         2ae36496a9aab0493b48ca3616ee8ad109f149ca -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2ae3649 Regenerate with rust2rpm v24