$ git clone -n https://src.fedoraproject.org/rpms/libkexiv2-qt5.git /var/lib/mock/f45-build-16430-486/root/chroot_tmpdir/scmroot/libkexiv2-qt5
Cloning into '/var/lib/mock/f45-build-16430-486/root/chroot_tmpdir/scmroot/libkexiv2-qt5'...
$ git fetch origin 17f18418745e87a20cc020f2cb4eed899a436cb5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libkexiv2-qt5
 * [new ref]         17f18418745e87a20cc020f2cb4eed899a436cb5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 17f1841 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild