$ git clone -n https://src.fedoraproject.org/rpms/perl-Feature-Compat-Class.git /var/lib/mock/f45-build-23458-597/root/chroot_tmpdir/scmroot/perl-Feature-Compat-Class
Cloning into '/var/lib/mock/f45-build-23458-597/root/chroot_tmpdir/scmroot/perl-Feature-Compat-Class'...
$ git fetch origin 85ae47a394ce89c3dd774d15e49599af7ed5bf45:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Feature-Compat-Class
 * [new ref]         85ae47a394ce89c3dd774d15e49599af7ed5bf45 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 85ae47a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild