$ git clone -n https://src.fedoraproject.org/rpms/rust-print-positions.git /var/lib/mock/f45-build-44002-809/root/chroot_tmpdir/scmroot/rust-print-positions
Cloning into '/var/lib/mock/f45-build-44002-809/root/chroot_tmpdir/scmroot/rust-print-positions'...
$ git fetch origin 6dee4803413ee698377b7797a14af9d73a4f00d5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-print-positions
 * [new ref]         6dee4803413ee698377b7797a14af9d73a4f00d5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6dee480 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild