$ git clone -n https://src.fedoraproject.org/rpms/perl-URI-db.git /var/lib/mock/f45-build-27324-622/root/chroot_tmpdir/scmroot/perl-URI-db
Cloning into '/var/lib/mock/f45-build-27324-622/root/chroot_tmpdir/scmroot/perl-URI-db'...
$ git fetch origin 26fe1fe8e4be4dd1f42057af2e7f3cd5c83d468c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-URI-db
 * [new ref]         26fe1fe8e4be4dd1f42057af2e7f3cd5c83d468c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 26fe1fe Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild