$ git clone -n https://src.fedoraproject.org/rpms/libxcvt.git /var/lib/mock/f45-build-17355-498/root/chroot_tmpdir/scmroot/libxcvt
Cloning into '/var/lib/mock/f45-build-17355-498/root/chroot_tmpdir/scmroot/libxcvt'...
$ git fetch origin 27245553cecb9de30ccc95e32247a9d70286ad94:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libxcvt
 * [new ref]         27245553cecb9de30ccc95e32247a9d70286ad94 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2724555 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild