$ git clone -n https://src.fedoraproject.org/rpms/perl-HTTP-Thin.git /var/lib/mock/f45-build-24072-601/root/chroot_tmpdir/scmroot/perl-HTTP-Thin
Cloning into '/var/lib/mock/f45-build-24072-601/root/chroot_tmpdir/scmroot/perl-HTTP-Thin'...
$ git fetch origin 66227ea772d82599a89725e5a357566e5362174d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-HTTP-Thin
 * [new ref]         66227ea772d82599a89725e5a357566e5362174d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 66227ea Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild