$ git clone -n https://src.fedoraproject.org/rpms/rust-dtor.git /var/lib/mock/f45-build-41392-782/root/chroot_tmpdir/scmroot/rust-dtor
Cloning into '/var/lib/mock/f45-build-41392-782/root/chroot_tmpdir/scmroot/rust-dtor'...
$ git fetch origin 63186e618c81cd8e9b4ee5e30a0bc19ce569eb30:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-dtor
 * [new ref]         63186e618c81cd8e9b4ee5e30a0bc19ce569eb30 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 63186e6 Update to version 1.0.5; Resolves RHBZ#2452357