$ git clone -n https://src.fedoraproject.org/rpms/perl-Parse-Yapp.git /var/lib/mock/f45-build-25684-612/root/chroot_tmpdir/scmroot/perl-Parse-Yapp
Cloning into '/var/lib/mock/f45-build-25684-612/root/chroot_tmpdir/scmroot/perl-Parse-Yapp'...
$ git fetch origin 17eed2e0fdbc91e52abe007a2ea798b3e64c7da6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Parse-Yapp
 * [new ref]         17eed2e0fdbc91e52abe007a2ea798b3e64c7da6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 17eed2e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild