$ git clone -n https://src.fedoraproject.org/rpms/perl-Export-Attrs.git /var/lib/mock/f45-build-23409-597/root/chroot_tmpdir/scmroot/perl-Export-Attrs
Cloning into '/var/lib/mock/f45-build-23409-597/root/chroot_tmpdir/scmroot/perl-Export-Attrs'...
$ git fetch origin 8a3afe3c5c214ce3f9418eafaa13825c60804bc6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Export-Attrs
 * [new ref]         8a3afe3c5c214ce3f9418eafaa13825c60804bc6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8a3afe3 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild