$ git clone -n https://src.fedoraproject.org/rpms/exiv2.git /var/lib/mock/f40-build-788881-135454/root/chroot_tmpdir/scmroot/exiv2
Cloning into '/var/lib/mock/f40-build-788881-135454/root/chroot_tmpdir/scmroot/exiv2'...
$ git fetch origin 13d5be23c273371d62d5bef258ef1f800d1f5600:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/exiv2
 * [new ref]         13d5be23c273371d62d5bef258ef1f800d1f5600 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 13d5be2 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild