$ git clone -n https://src.fedoraproject.org/rpms/perl-Set-Tiny.git /var/lib/mock/f45-build-26190-616/root/chroot_tmpdir/scmroot/perl-Set-Tiny
Cloning into '/var/lib/mock/f45-build-26190-616/root/chroot_tmpdir/scmroot/perl-Set-Tiny'...
$ git fetch origin 7230db2c133a09d6d89064184ab924909f796056:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Set-Tiny
 * [new ref]         7230db2c133a09d6d89064184ab924909f796056 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7230db2 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild