$ git clone -n https://src.fedoraproject.org/rpms/perl-Exporter-Tiny.git /var/lib/mock/f45-build-23362-597/root/chroot_tmpdir/scmroot/perl-Exporter-Tiny
Cloning into '/var/lib/mock/f45-build-23362-597/root/chroot_tmpdir/scmroot/perl-Exporter-Tiny'...
$ git fetch origin 7fb0214dfe24182e7718374425167f038225fdc8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Exporter-Tiny
 * [new ref]         7fb0214dfe24182e7718374425167f038225fdc8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7fb0214 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild