$ git clone -n https://src.fedoraproject.org/rpms/libqalculate.git /var/lib/mock/f45-build-16806-491/root/chroot_tmpdir/scmroot/libqalculate
Cloning into '/var/lib/mock/f45-build-16806-491/root/chroot_tmpdir/scmroot/libqalculate'...
$ git fetch origin 2809e125c8b6c1681da8c18a0d7e46cf3d369ab5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libqalculate
 * [new ref]         2809e125c8b6c1681da8c18a0d7e46cf3d369ab5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2809e12 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild