$ git clone -n https://src.fedoraproject.org/rpms/perl-Plack-Test-ExternalServer.git /var/lib/mock/f39-build-2246713-53811/root/chroot_tmpdir/scmroot/perl-Plack-Test-ExternalServer
Cloning into '/var/lib/mock/f39-build-2246713-53811/root/chroot_tmpdir/scmroot/perl-Plack-Test-ExternalServer'...
$ git fetch origin 897a7a737063d22f85a35b495cb42bb7c8f9c81e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Plack-Test-ExternalServer
 * [new ref]         897a7a737063d22f85a35b495cb42bb7c8f9c81e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 897a7a7 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild