$ git clone -n https://src.fedoraproject.org/rpms/perl-Data-Tumbler.git /var/lib/mock/f45-build-22948-595/root/chroot_tmpdir/scmroot/perl-Data-Tumbler
Cloning into '/var/lib/mock/f45-build-22948-595/root/chroot_tmpdir/scmroot/perl-Data-Tumbler'...
$ git fetch origin 212256986601ebff7db05c8254123442d0796535:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Data-Tumbler
 * [new ref]         212256986601ebff7db05c8254123442d0796535 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2122569 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild