$ git clone -n https://src.fedoraproject.org/rpms/rust2rpm.git /var/lib/mock/f39-build-1791528-41744/root/chroot_tmpdir/scmroot/rust2rpm
Cloning into '/var/lib/mock/f39-build-1791528-41744/root/chroot_tmpdir/scmroot/rust2rpm'...
$ git fetch origin cbf564b138d70cccd241105447c2c3a6013c0dd3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust2rpm
 * [new ref]         cbf564b138d70cccd241105447c2c3a6013c0dd3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cbf564b Update to version 25.0.2; Fixes RHBZ#2250386