$ git clone -n https://src.fedoraproject.org/rpms/perl-Future-IO.git /var/lib/mock/f40-build-2017511-46317/root/chroot_tmpdir/scmroot/perl-Future-IO
Cloning into '/var/lib/mock/f40-build-2017511-46317/root/chroot_tmpdir/scmroot/perl-Future-IO'...
$ git fetch origin f478557576f9241788eb9395f2bbf4e76ff38daa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Future-IO
 * [new ref]         f478557576f9241788eb9395f2bbf4e76ff38daa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f478557 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild