$ git clone -n https://src.fedoraproject.org/rpms/perl-App-Packager.git /var/lib/mock/f45-build-21715-587/root/chroot_tmpdir/scmroot/perl-App-Packager
Cloning into '/var/lib/mock/f45-build-21715-587/root/chroot_tmpdir/scmroot/perl-App-Packager'...
$ git fetch origin 1cf7b09e1bc9bda6f7f1eb1183868e4c4f36510b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-App-Packager
 * [new ref]         1cf7b09e1bc9bda6f7f1eb1183868e4c4f36510b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1cf7b09 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild