$ git clone -n https://src.fedoraproject.org/rpms/rust-punycode.git /var/lib/mock/f45-build-44108-810/root/chroot_tmpdir/scmroot/rust-punycode
Cloning into '/var/lib/mock/f45-build-44108-810/root/chroot_tmpdir/scmroot/rust-punycode'...
$ git fetch origin f5a17528c8b18070a7aa4acca2afb2fad772c090:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-punycode
 * [new ref]         f5a17528c8b18070a7aa4acca2afb2fad772c090 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f5a1752 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild