$ git clone -n https://src.fedoraproject.org/rpms/perl-AppConfig-Std.git /var/lib/mock/f45-build-21791-588/root/chroot_tmpdir/scmroot/perl-AppConfig-Std
Cloning into '/var/lib/mock/f45-build-21791-588/root/chroot_tmpdir/scmroot/perl-AppConfig-Std'...
$ git fetch origin 546d749bf5ab156fb9753fd326aeb127717a0bc8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-AppConfig-Std
 * [new ref]         546d749bf5ab156fb9753fd326aeb127717a0bc8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 546d749 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild