$ git clone -n https://src.fedoraproject.org/rpms/cargo2rpm.git /var/lib/mock/f39-build-1881661-42762/root/chroot_tmpdir/scmroot/cargo2rpm
Cloning into '/var/lib/mock/f39-build-1881661-42762/root/chroot_tmpdir/scmroot/cargo2rpm'...
$ git fetch origin 5e2a02b16c03819737f16712961d17e1eccec430:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cargo2rpm
 * [new ref]         5e2a02b16c03819737f16712961d17e1eccec430 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5e2a02b Update to version 0.1.14; Fixes RHBZ#2252412